A married woman, Yuka, who lives with her husband and brother-in-law, Mamoru. One day, Mamoru, who continues to be an unsuccessful actor, finally passes an audition for a stage play. However, Yuka says to Mamoru, who is troubled by the "kiss scene", that she will accompany him during the rehearsals and kisses her... Yuka, who has become absorbed in Mamoru's intense kissing act that doesn't know how to do it, stretches out her tongue and entangles herself. Since then, the stage begins with just the two of them exchanging kisses with Mamoru while persuading themselves that they are practicing for a play.